Brake-shoe



H, R. MOALIST-BR.

Brake-Shoe.

No. 224,456. Patentlad Feb. 10, 1880.

@itnssss ATTORNEY.

FETERS. PHOTO-LITHOGRAFHER WASHINGTON D C UNITED STATES I P TENT OFFICE.

HUGH R. MoALISTER, OF PHILADELPHIA,PENNSYLVANIA.

BRA KE-SHOE.

SPECIFICATION forming part of Letters Patent No. 224,456, dated February10, 1880.

Application filed July 11, 1879. i

To all whom it may concern:

Be it known that I, HUGH R. MCALISTER, of the city and county ofPhiladelphia, and State of Pennsylvania, have invented a new and usefulImprovement in Brake-Shoea'which improvement is fully set forth in thefollowing specification and accompanying drawings, in wh'ich- Figure 1is a side elevation of the brakeshoe embodying my invention. Fig. 2 is acentral vertical section thereof. Fig. 3 is a front view of the stock ofthe shoe. a View of the inner face of the liner.

Similar letters of reference indicate corresponding parts in the severalfigures.

My invention consists in securing the liner or facing to the stock bymeans of V-shaped or segmental flanges which are formed on the facingand stock, respectively, and engage one with the other by lateral motionof either part.

The stock has at its upper end two flanges, the centers or crowns ofwhich face inwardly or in opposite directions, and the liner has at itsupper end a flange which enters between the two flanges of the stock,and then drops in position so as, with the assistance of the lowerflanges, to lock the liner and stock without the employment of bolts,pins, or keys.

It also consists in securing the stock and block by means of a T-headedbolt, as will be hereinafter set forth.

Referring to the drawings, A represents the stock of the shoe, the samehaving on its front face at top a flange, to, adjacent thereto a flange,b, and at bottom a flange, c, the several flanges .exten din gtransversely and formed of V-sh aped or segmental pieces.

The segmental or'V edges of the flanges b 0 face each other, and theedge of the bottom flange, 0, has its center pointing or facingdownward. V

B represents the liner or facing of the shoe, and consists of adetachable. piece having on its inner face upper and lower V-shaped orsegmental flanges d e, which point or face in opposite directions, asshown.

. The flange d is adapted to engage with the flanges a b, and the flange0 with the flange c,

and the contiguous faces of the flanges are o dovetailed.

The operation is asfollows': In order to ap- Fig. 4 is at the top of theliner and stock, and the flanges 0 e at the bottom thereof, whereby theliner is securely heldto the stock and prevented from longitudinal orvertical displacement.

Thestrength of the locked connection of the liner and stock is furtherincreased by hooks O, which project from'the back of the liner at thetop and bottom thereof, and are adapted to overhang the top and bottomedges of the stock, thus providing an additional connection for theliner and stock and means for receivin g the strain of the linerwhen-the brakes are applied. By properly rotating the liner the severalflanges disengage, and thus the liner may be removed. 7

During, the application and removal of the liner the hooks O 0 presentno obstacles to .either movement, and when the liners are in positionand operation, while they are securely held and prevented from lateraldisplacement, the flangesof the car-wheels serve as further barriers tosuch displacement, thus insuring the operation and service of the liner.

D represents the block, which is connected to the stock by means of aT-headed bolt, E, the head whereof is passed through a narrow opening,f, in the stock, and when turned ata right angle to said opening restson the side walls thereof. Consequently, when the nut of the bolt istightened against the beam F the stock and block are securely connected,the security being increased by the side walls, 9 of the blockoverlapping the back of the stock, and flanges h at the topand bottom ofsaid back embracing middle portion, h, of the block. t

When the block and stock require separation for any cause whatsoever,the nut of the bolt E is loosened, and the bolt turned until its headregisters with the opening f in the stock, whereby the parts aredisconnected. The bolt may now be withdrawn, and its head will passfreely through the openin g f.

' It will be seen that the stock and block may be connected and.disconnected without removal of the liner, as the position and operationof the bolt E do not interfere with the liner. The improper rotation ofthe bolt is prevented by its head engaging with or dropping in shouldersor notches k on the side Walls of the stock.

It will also be seen that the liner and stock are connected withoutbolts, pins, screws, or similar fastenings.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The stock A, having at its upper end two dovetail flanges, ab, thecenters or crowns whereof face in opposite directions, and at its otherend a dovetail flange, c, in combination with the liner having dovetailflanges d c at opposite ends, the several flanges being V- shaped orsegmental, substantially as and for the purpose set forth.

2. The stock A, with flanges a I) e, in combination with theliuer B,with flanges d e, and hooks (3 O, substantially as and for the purposeset forth.

3. The stock A, having a narrow opening, f, the T-headed bolt E, and theblock D, combi ned and operating substantially as described, whereby thestock and block may be connected and separated without removal of theshoeliner, as stated.

4.. The T-headed bolt and bloclcD, in combination with the stock A,formed with the shoulders or notches is, substantially as and for thepurpose set forth.

HUGH R. MCALISTER.

Witnesses:

J OHN A. WIEDERSHEIM, A. P. GRANT.

